Sound reproducing and recording akpabattts



E. T. TURNEY. SOUND REPRODUCING AND RECORDING APPARATUS.- APPLICATION FILED JAN.4, l'9l9.

1 ,306, 1 3 1 Patented June 10, 1919.

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' EUGENE T. Tfilitfii'EY, 43F NEW "KGB-K, N. Y., ASS'IGNOROF (ENE-HALF TO ERNEST G.

WILGQX, (3F MERIEEN, CONNECTICUT.

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Application filed .i'anuary t, 1919.- Serial No. 269..2'59.

To all ac/3.0222. it may concern Be it known that I, EUGENE T. Tunney, a citizen of the United States of America,

"residing at New York city, county and State provements in construction whereb sounds maybe reproduced or recorded with great fidelity as to detail and quality. Another object is to provide an improved construction whereby thevolume of sound reproduced may be, intensified without sacrifice to lit Other objects and advantages will ng of the following description and .notation of the accompanying drawin. which I have conventionally shown L in one preferred form, it be-.' 1mg OiJYlOllfi that the same may be modlfied in various ways without departure from the ap'iritor scope of my invention. in the drawings:

Figure l'is a plan view of an apparatus constructed to embody my invention.

view thereof on the line 2-2 of Fig. 1.

Fig. 3 is a relatively enlarged sectional view on the line 3-3 of Fig.1.

Fig. 4: illustrates a'modified detail. 1. represents a diaphragm. 2 is a back having a sound passage 3. 4 is a flanged annulus secured to the back preferably in such a manner as to clamp the d aphragm 1 securely in place. -5 represent two 46 bushings for suitably holding the edge of the diaphragm. 6 is a vibratory needle bar ful- 1 and with the bridge bar 8. In. the par-- ticularform shown, the-inner'end of the conent to those skilled in this art from Fig. 2 is relatively enlarged sectional- 'a pulling strain on the connection 11, and

. commonly in vogue.

-seem to possess qualities'which most closely approximate the true-quality of the sounds recorded and which lt lS sought to repro; 11

nection 11 is passed through the diaphragm and knotted underneath the same. The

middle portion of the connection 11.. is wrapped around or otherwisesuitably fastened to that part of the needle bar directly above the connection with the diaphragm. The outer end of the connection 11 is secured to the bridge 8 preferably by means of an adjusting screw 12 which is carried by the bridge and by which the tension of the connection 11 maybe regulated. In this particular instance, the screw .12 is hollow and theioute'r end of the connection llis passed through the same and knotted. If

. desired, the connection 11 when made of catgut or any material affected by moisture, may be covered with water-glass to protect the same and to. also stifl'en that part wrapped around the needle so that-it will not work loose. The bridge Sshould, of course, be connected to the diaphragm in such a position relatively to-the nodal points thereof as tonot materially interfere with the vibrations of said diaphragm, and the proper location may be determined by trial until the 50 best results are secured with the particular diaphragm used. Obviously, when diaphragms of uniform dimensions are determined upon and used, the proper setting of the bridge in one case will practically de- 8 termine the setting in all cases.

In operation, and for the purposes of reproducing sound, the needle or point 14 carried at the outer end of the needle bar may be set down into. a record groove so that as the point trails through said groove, the undulations therein will oscillate the needle bar so as to vibrate the diaphragm through the medium of the connection 11. It will be. observed that the movement of the inner end of the needle bar both to and fro exerts hence, the flexing of the diaphragm in both directionsis produced solely by the pull of the needle bar rather than by a direct and 10 jzcsitive push and pull movement. such as I attributethe successful operation of the instrument in a. very substantial measure to the aforesaid operation of said connection, and'when the bridge is made' of wood and the connection is made of catgut or the like. the sounds reproduced dupe. While have described my invention chiefly as a sound reproducing deyice, it will of course be understood that. the same means maybe used :for 'pr oducing-a groove, on the wall or Walls of-which sound waves are to be recorded by minuteundulations, and it is my intention that the following claims are to be of such scope as to cover said apparatus Whether the same is used forone purpose or the other. e

9, Fig. 4, represents one of the feet shown in Fig. 3, by means of which the bridge is connected or put in contact with the diaphragm, the lower end of the foot in this case'bei n-gtapered so as to afford substantially a line contact with the diaphragm instead oj a c'ontact of substantially more area, such as SliOWlllll the previous figures.

,In some instances, the holding screws 10 -10 may be omitted since the tension of the connector 11 navbesuiiicient to hold the bridge' in contactivitlr i'e diaphragm. Obviously, .a's to-sucli details :I contemplate that many modifications may be made.

What I claim is:

'1. In an instrument of the character dcffscib d, a diaphragm, a vibratory needle connection including a bar overstanding. said-needle bar and diaphragm and mounted iiponthe latter Within the field of vibration.

3. In an instrument of the character described, a diaphragm, a vibratory needle bar, a flexible connection between said bar and said diaphragm whereby a pulling move-.

ment upon said connection Will positively flex said diaphragm in. both directions, said connection including a bar overstanding said needle bar and diaphragm and mounted at two points upon the latter Within the field of vibration." v I .4. In an instrument of t iecliaracter d6? scribed; a diaphragm, a bridge mounted at a plurality of points thereon within the field of vibration, a vibratory'needlebar, one end of the same being located between said bridge and said diaphragm and a flexible.

connection between the end of said needle bar and the bridge and the diaphragm.

5. In an instrument of the character de. scribed, adiaphragm, a vibratory member, a device overstanding "said member and "in contact with said diaphragm Within the vi brating field thereof, and a connection from said member to said diaphragm and to said device whereby the impulses of said vibrating member \villbe transmitted to said diaphragm. I

6. In an instrument of the .characterade scribed, a diaphragm, a vibratory member, a bridge overst-anding said vibratory member and mounted upon said diaphragm at oppositesides'ofsaid member and Within the vi-. brating field of said diaphragm, and a connection from said memberto said diaphragm and to said bridge whereby the vibratory impulses of'said member will-be transmitted to said diaphragm directly and also through the medium of said' bridge. I

7."In an instrument of the character described, a diaphragnna vibratory member adjacent said diaphragm, a bridge mounted on said diaphragm and overstanding said member and an adjustable flexible connection from said member to said diaphragm and to said bridge. 1

.EUGENE 'I. TURNEY. 

